CN112926714A - Visual three-dimensional code integrating QR code, bar code and optical character and coding method thereof - Google Patents

Visual three-dimensional code integrating QR code, bar code and optical character and coding method thereof Download PDF

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CN112926714A
CN112926714A CN202110290092.1A CN202110290092A CN112926714A CN 112926714 A CN112926714 A CN 112926714A CN 202110290092 A CN202110290092 A CN 202110290092A CN 112926714 A CN112926714 A CN 112926714A
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牛建伟
苏昊
李青锋
高志强
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Beihang University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
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    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field

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Abstract

The invention provides a visual three-dimensional code fusing a QR (quick response) code, a bar code and optical characters and a coding method thereof, and relates to a multimedia coding technology and an image processing technology. The visual three-dimensional code stores and displays three information images, namely the QR code, the bar code and the OCR character image, on the same spatial plane without damaging the stored information content. The coding method comprises the following steps: acquiring three types of information coding images, splicing the bar code image with the text image to generate an OCR bar code image, scheduling the position of a black-white module in the QR code image to enable the distribution of the black-white module to be coincident with the distribution of the black-white bar code in the OCR bar code image, and finally synthesizing the QR code image and the OCR bar code image to obtain the three-dimensional code. The method solves the problem that the data load is limited when the traditional QR code, bar code and OCR image are independently used, and the existing equipment has high robustness for correctly identifying the visual three-dimensional code content.

Description

Visual three-dimensional code integrating QR code, bar code and optical character and coding method thereof
Technical Field
The invention relates to a multimedia coding technology, a QR (quick response) code and bar code coding technology, an optical character recognition technology, an image processing technology and a cryptography technology, in particular to a visual three-dimensional code integrating the QR code, the bar code and the optical character recognition technology.
Background
The QR code and the bar code are common two-dimensional codes and are widely applied in the world; optical Character Recognition (OCR) refers to a technology of converting characters in a paper document into an image file of a black-and-white dot matrix optically, and converting the characters in the image into a text format through recognition software for further editing and processing by word processing software. However, based on the prior art, the QR code and the barcode have two independent sets of encoding mechanisms and standards, and if the QR code and the barcode are used separately, the data load is limited due to the restriction of encoding rules. Meanwhile, the traditional QR code and the bar code need to occupy a complete plane, and cannot respectively contain extra information such as OCR images or characters, and if the QR code, the bar code and the OCR character images are used simultaneously, the QR code and the bar code respectively need to occupy a certain plane space area, so that the defects of large storage volume, inconvenient use, low flexibility, low data capacity and the like exist.
Disclosure of Invention
The invention aims to provide a visual three-dimensional code fusing QR (quick response) codes, bar codes and optical character recognition technologies and a coding method thereof. In addition, QR code and bar code universal decoders and OCR software are highly robust to the correct recognition of three-dimensional code content.
The invention provides a visual three-dimensional code integrating QR codes, bar codes and optical character recognition technology, which comprises the following steps:
an OCR bar code image I of a regular quadrangle with the side length of l; the central position of the image I is a bar code image TiAnd a text image OiSplicing the combined images; strip for packaging articlesShape code image TiThe input bar code content information is encoded and generated, and a text image O is generatediInput OCR content information is coded and generated;
a QR code image Q of a regular quadrangle with the side length of l; the image Q is generated in the following manner: generating a QR code image Q by a QR code standard encoder for input QR code content informationi(ii) a For image QiThe position of the black and white module in the system is adjusted by using a position scheduling strategy xi, and the adjusted QR code image is zoomed into a regular quadrangle with the side length of l; replacing each black-and-white module in the zoomed QR code image with a black-and-white module with a smaller size while keeping the center position and color of the module unchanged, and setting the rest position as transparent color to obtain an image Q;
and (3) placing the image I on the bottom layer of the image Q, and synthesizing to obtain the three-dimensional code S.
The invention discloses a visual three-dimensional code coding method fusing QR codes, bar codes and optical character recognition technology, which comprises the following steps:
step one, acquiring pre-coded bar code content information TcAnd QR code content information QcAnd OCR content information Oc(ii) a For TcGenerating barcode image T based on barcode encoding standardiTo O, tocGenerating a text image O using an image generatoriFor QR code content information QcGeneration of QR-code images Q using QR-code standard encodersi；
Step two, the bar code image T is processediAnd a text image OiSplicing to generate an OCR bar code image I of a regular quadrangle with the side length of l;
step three, the QR code image Q is treatediThe position of the black and white module in the system is scheduled by utilizing a position scheduling strategy xi;
the location scheduling policy ξ includes: first, Q is scheduled by Gaussian eliminationiThe position of the middle square black-white coding module enables the distribution of the black-white modules in the QR code and the bar code image TiThe distribution of the medium black and white bar codes is coincident; then, Q is addediIn other scattered black and white modules, as much as possible circularly scheduled to QiThe edge position of (a);
step four, the QR code image Q output after the position scheduling in the step three is carried outiZooming is carried out, and the side length size of the image is adjusted to be l; then image Q is displayediEach black-and-white module in the QR code image acquisition module is replaced by a smaller black-and-white module, the position and the color of the center of the module are kept unchanged, and the rest position in the module is set to be transparent, so that a QR code image Q with the size of l is obtained; and finally, placing the OCR bar code image I generated in the step two on the bottom layer of the Q, and synthesizing to obtain the three-dimensional code S.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) compared with the prior art, the method solves the problem that the data load is limited when the traditional QR code, the bar code and the OCR image are independently used.
(2) Compared with the prior art, the method overcomes the defects of large storage volume, inconvenient use, low flexibility and the like when the traditional QR code, the bar code and the OCR image are used together.
(3) The invention realizes the storage and display of three information images of the QR code, the bar code and the OCR character image in the same space plane, does not damage the information contents stored in the stored QR code, the bar code and the OCR character image while fusing and storing the three information, supports the identification of the QR code, the bar code general decoder and the OCR software on the three information images contained in the three-dimensional code, and has high robustness.
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Fig. 1 is a flow chart of an encoding implementation of the visual three-dimensional code of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings.
The visual three-dimensional code fusing the QR code, the bar code and the optical character recognition technology stores and displays the QR code, the bar code and the OCR character image on the same spatial plane without damaging the information content of the stored QR code, the bar code and the OCR character image. Referring to fig. 1, a flow of implementing the visual three-dimensional code of the present invention is described in detail in five steps.
Step 1:inputting pre-encoded barcode content information TcContent information Q of QR codecOCR content information Oc。
As in the example of fig. 1, barcode content information T to be encoded is inputcIs '123456789', QR code content information OcTo "abcdefg", OCR content information QcIs "This is QR code".
Step 2: generating barcode image T based on barcode encoding standardiGenerating a text image O using an image generator based on OCR text contenti。
As in FIG. 1, for TcGenerating a barcode image T using a barcode encoding standardiTo O, tocGenerating a text image O with an image generatori。
And step 3: bar code image TiAnd a text image OiAnd performing text splicing to generate a regular quadrilateral OCR bar code image I with the side length of l.
As shown in fig. 1, a text image OiAnd the bar code image TiPut together, embodiments of the present invention incorporate OiIs arranged at TiThe center position below the bar code image I is arranged at the center position of the OCR bar code image I; the distances from the image I around the combined image are the same, wherein the distance ranges from 25% to 50% of the width of the image I. Bar code image TiAnd a text image OiCan be clearly recognized in the image I.
And 4, step 4: the invention utilizes a QR code standard encoder and a QR code module position scheduling Method (reference 1: Mingliang Xu, Qingfeng Li, Jianwei Niu, et al. ART-UP: A Novel Method for Generating Scanning-robust aesthetical QR code. arxiv: 1803.02280[ cs. MM]March 2018), for O, by the position scheduling policy ξ proposed by the present inventioncCoding to obtain QR code image Qi，Qi＝ξ(Qc，Ti，Oi)。
A black and white module position scheduling algorithm in the QR coding process is disclosed in reference 1. Firstly, to QR code content information QcStandard encoding using QR codesThe device encodes and then schedules the module using the module location scheduling method in reference 1, but needs to be scheduled according to the scheduling policy of the present invention.
The scheduling strategy xi proposed by the invention is as follows: first, Q is scheduled by Gaussian eliminationiThe position of the middle square black-white coding module preferentially enables the distribution of the black-white modules in the QR code to coincide with the distribution of the black-white bar codes in the bar code; secondly, at QiIn the method, other scattered black and white modules are dispatched to the QR code image Q in a ring shape as much as possibleiEdge position of (2), as shown in FIG. 1QiAnd (4) an image.
Setting the weight W of the module scheduling priority as follows:
W＝λ1Bar+λ2Ann (1)
bar is the weight of the control module and the Bar code. Ann is the weight of the circular diffusion. Lambda [ alpha ]1And λ2Is a parameter for controlling the weight of each item, and can be freely adjusted. Ann is defined as follows:
Figure BDA0002978630550000031
wherein, x and y are respectively a row number and a column number of the module in the whole QR code; and m is the module number of each edge of the QR code. Ann (x, y) represents the weight of the module (x, y) for performing circular diffusion.
And 5: will be based on the QR code image Q generated in step 4iThe side length of the QR code image is adjusted to be l, the black-white module is replaced by a smaller module, the black-white color of the center of the module is kept unchanged, the rest position is set to be transparent, and the processed QR code image Q with the size of l is obtained. And (4) placing the regular quadrilateral OCR bar code image I with the side length of l generated in the step (3) on the bottom layer of the Q, and synthesizing to obtain the three-dimensional code S.
In the embodiment of the invention, each black-and-white module is replaced by a circle with the side length of 1/3 modules, wherein the circle center is superposed with the center position of the module, the color of the circle is correspondingly the same as that of the black-and-white module, and the area of the module except the circle is set to be transparent.
The visual three-dimensional code comprises the OCR bar code image I generated in the steps 2-3 and the QR code image Q which is generated in the steps 4-5 and has the same size with the image I, and the image I is placed at the bottom layer of the image Q and then synthesized to obtain the visual three-dimensional code.
The three-dimensional code S finally obtained as shown in fig. 1 is a visual three-dimensional code generated by adopting the encoding technology of the present invention and fusing the QR code, the barcode and the optical character recognition technology, wherein the visual three-dimensional code stores and displays the QR code, the barcode and the OCR character image on the same spatial plane, and after the verification, the generated three-dimensional code supports the recognition of the QR code, the barcode universal decoder and the OCR software on three information images contained in the three-dimensional code, and has high robustness.

Claims (5)

1. A visual three-dimensional code fusing QR (quick response) codes, bar codes and optical character recognition technology is characterized by comprising the following components:
an OCR bar code image I of a regular quadrangle with the side length of l; the central position of the image I is a bar code image TiAnd a text image OiSplicing the combined images; bar code image TiThe input bar code content information is encoded and generated, and a text image O is generatediInput OCR content information is coded and generated; OCR denotes optical character recognition;
a QR code image Q of a regular quadrangle with the side length of l; the image Q is generated in the following manner: generating a QR code image Q by a QR code standard encoder for input QR code content informationi(ii) a For image QiThe position of the black and white module in the system is adjusted by using a position scheduling strategy xi, and the adjusted QR code image is zoomed into a regular quadrangle with the side length of l; replacing each black-and-white module in the zoomed QR code image with a black-and-white module with a smaller size while keeping the center position and color of the module unchanged, and setting the rest position as transparent color to obtain an image Q;
and (3) placing the image I on the bottom layer of the image Q, and synthesizing to obtain the three-dimensional code S.
2. A visual three-dimensional code coding method fusing QR codes, bar codes and optical character recognition technology is characterized by comprising the following steps:
step 1, acquiring pre-coded bar code content information TcAnd QR code content information QcAnd OCR content information Oc(ii) a OCR denotes optical character recognition;
step 2, for TcGenerating barcode image T based on barcode encoding standardiTo O, tocGenerating a text image O using an image generatori；
Step 3, the bar code image TiAnd a text image OiSplicing to generate an OCR bar code image I of a regular quadrangle with the side length of l;
step 4, carrying out content information Q on the QR codecGeneration of QR-code images Q using QR-code standard encodersiThen, the position scheduling strategy xi is reused to carry out image QiThe position of the black and white module in the system is output after being scheduled;
the location scheduling policy ξ includes: first, Q is scheduled by Gaussian eliminationiThe position of the middle square black-white coding module enables the distribution of the black-white modules in the QR code and the bar code image TiThe distribution of the medium black and white bar codes is coincident; then, Q is addediIn other scattered black and white modules, as much as possible circularly scheduled to QiThe edge position of (a);
step 5, firstly, the image Q output in the step 4 is comparediZooming, and adjusting the side length to be l; then image Q is displayediEach black-and-white module in the QR code image processing system is replaced by a smaller black-and-white module, the position and the color of the center of the module are kept unchanged, the rest position in the module is set to be transparent, and a QR code image Q with the size of l is obtained after processing; and finally, placing the OCR bar code image I generated in the step 3 on the bottom layer of the Q, and synthesizing to obtain the three-dimensional code S.
3. The method of claim 2, wherein in step 3, the stitched image is located at the center of the image I, and the distance l from the periphery to the edge is 25% -50%.
4. The method of claim 2Wherein, in the step 4, the image Q is processediThe black and white module position in (x, y) is scheduled, and the weight W of the scheduling priority is lambda1Bar+λ2Ann, wherein λ1And λ2The weight is a parameter for controlling the weight, Bar is the weight of the superposition of the black and white module and the Bar code, and Ann is the weight of annular diffusion; ann is calculated as follows:
Figure FDA0002978630540000021
wherein m represents a QR code image QiThe number of modules on each side.
5. The method of claim 2, wherein in step 5, the image Q is obtainediEach black-and-white module in (1) is replaced by a smaller black-and-white module, specifically: and each module is replaced by a same-color circle with the radius of 1/3 module side lengths, the circle center is superposed with the center of the module, and the region except the circle in the module is set to be transparent.
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CN115358246A (en) * 2022-10-24 2022-11-18 湖南会成科技有限公司 Information interaction method and device, storage medium and processor

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